Barkskin is a useful skill if you don't minmax during character creation. Sure, that halfelf / woodelf who starts with a +3 to dex and wis at level 1 will likely never use it. But if you want to RP an old human druid with a frail body and a sharp mind it can be very reasonable to use barkskin.
Generally in my opinion there are enough overpowerd spells or abilities in this game already, so instead of buffing the rest I'd rather see the overperforming ones to be tuned down a bit.
